* See the COPYING file in the top-level directory.
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
+#include "qemu/cutils.h"
#include "qemu/event_notifier.h"
-#include "sysemu/char.h"
#include "qemu/main-loop.h"
#ifdef CONFIG_EVENTFD
#include <sys/eventfd.h>
#endif
+#ifdef CONFIG_EVENTFD
+/*
+ * Initialize @e with existing file descriptor @fd.
+ * @fd must be a genuine eventfd object, emulation with pipe won't do.
+ */
void event_notifier_init_fd(EventNotifier *e, int fd)
{
e->rfd = fd;
e->wfd = fd;
+ e->initialized = true;
}
+#endif
int event_notifier_init(EventNotifier *e, int active)
{
e->rfd = fds[0];
e->wfd = fds[1];
}
+ e->initialized = true;
if (active) {
event_notifier_set(e);
}
void event_notifier_cleanup(EventNotifier *e)
{
+ if (!e->initialized) {
+ return;
+ }
+
if (e->rfd != e->wfd) {
close(e->rfd);
}
+
+ e->rfd = -1;
close(e->wfd);
+ e->wfd = -1;
+ e->initialized = false;
}
-int event_notifier_get_fd(EventNotifier *e)
+int event_notifier_get_fd(const EventNotifier *e)
{
return e->rfd;
}
-int event_notifier_set_handler(EventNotifier *e,
- EventNotifierHandler *handler)
+int event_notifier_get_wfd(const EventNotifier *e)
{
- qemu_set_fd_handler(e->rfd, (IOHandler *)handler, NULL, e);
- return 0;
+ return e->wfd;
}
int event_notifier_set(EventNotifier *e)
static const uint64_t value = 1;
ssize_t ret;
+ if (!e->initialized) {
+ return -1;
+ }
+
do {
ret = write(e->wfd, &value, sizeof(value));
} while (ret < 0 && errno == EINTR);
ssize_t len;
char buffer[512];
+ if (!e->initialized) {
+ return 0;
+ }
+
/* Drain the notify pipe. For eventfd, only 8 bytes will be read. */
value = 0;
do {